Nut-lock.



E. R. HIBBARD.

v NUT LOCK.

APPLICATION fiLED ocnza. 1912.

1,228,671 I Patented June 5,1917.

2 SHEETS-SHEET l- E. R. HIBBARD.

NUT'L'OCK. APFLIIIATION FILED OCT-25. l9l2.

Patented if we 5, 1917.

2 SHEETS-SHEET 2.

EDWARD R. HIBIBARD, OF CHICAGO, ILLINOIS, ASSIGNOR TO GRIP NUT COMPANY,0F

CHICAGO, ILLINOIS, A C0R1?OIRJXELION OF ILLINOIS. V

NUT-LOCK.

To all whom it may concern:

Be it known that I, EDWARD R. Humane, a citizen of the United States,residing at Chicago, in the county of Cook and State of Illinois, haveinvented certain new and useful Improvements in Nut-Locks, of which thefollowing is a description.

My invention belongs to that general class of devices adapted to beengaged with a bolt, either as a nut alone, or in cooperation therewith,and so constructed as to tend to prevent the accidental disengagement ofthe nut and bolt.

To this end my invention consists in the novel construction of thedevice herein shown and described.

In the drawings wherein like reference characters indicate like orcorresponding parts:

Figure 1 is a plan view of the lock embodying my invention.

Fig. 2 is a perspective view of the same.

Fig. 8 is a sectional view on line 3, 3 of Fig. 1, showing the ends ofthe severed thread permanently displaced in opposite directions adistance greater than the pitch of the thread of the bolt upon which itis adapted to be used.

Fig. t is a sectional view on line 4, 4 of Fig. 1.

Fig. 5 is a diagrammatic view indicating the formation of the threadmember on said lock.

Fig. 6 is a plan view of a modified form of my invention.

Fig. 7is a sectional view on line 7, 7 of Fig. 6.

Fig. 8 is a sectional view on line 8, 8 of Fig. 6.

Fig. 9 is a diagrammatic view similar to Fig. 5, showing aslightlymodified form of thread on the lock member.

Fig. 10 is a plan.view of another modification.

. Fig. 11 is a sectional view on line 11, 11 of Fig. 10.

In the drawings, 1 indicates a washer or nut blank, having formedtherein a bolt opening 2. The washer is preferably punched out, and whenso formed the inner wall of the opening 2 is brought substantially to aV-shape, as shown in Figs. 3 and 4, at 3 adapted to cooperate with thesunk portions between the two projecting threads of a bolt. At one ormore points, as at 4,

Patented June 5, 1917.

Application filed October 25, 1912. Serial No. 727,748.

the circular wall of the punched opening 2 is separated, leaving the twoends 5, 5 slightly separated, which are given a twist, or ofiset fromone another on the plane of the washer, so as to permit the V-shapedwasher to conform to the regular progression of a thread on a bolt,andthe nut or washer 1 may be threaded on said bolt in the manner commonto bolt nuts. In addition thereto, the said thread member 3 isundulatedor waved, as most clearly shown at 6, 6 of Fig. Thisconstruction causes the said member 3 to be pressed upon andfrictionally engage with the opposite walls of the depression betweentwo extending threads of the bolt. The nut or lock being preferably ofresilient material, produces a resilient frictional engagement of thenut with the bolt threads, preferably at, a plurality of points.

In operation the lock may be employed either with or without theordinary bolt nut. However, where any severe strain is likely to comeupon the parts, it is preferable to employ the usual nut to take thestrain, and employ my improved nut or lock mainly for the purpose oflocking the parts in position and preventing the nut becoming loosenedby use or the jarring of parts, or in any other accidental way.

As a modification of the lock just described, I prefer. in punching thelock out, to construct comparatively sharp impinging shoulders 7, 7 onone or both sides of the thread portion 3 extending in a direction whichwill permit the lock to be readily screwed down upon the bolt 1, butupon undertaking to back the lock off, will tend to impinge upon theadjacent portion of the bolt thread and engage therewith, therebyrendering the removal of the lock more difficult. Obviously these offsetportions should be positioned upon the highest or the lowest point, soto speak, of the thread, which will bring them at a point where thegreatest pressure is brought upon the ad acent portion of the boltthread. They may also beconical, semi-conical or substantiallypyramidical shaped, as shown in Fig. 7, or square faced, as in Fig. 8.

As an additional improvement, and serving as a matter of convenience inpositioning or" removing the lock, and to facilitate the engagement ofthe wrench therewith, the marginal edges of the lock may be turne a noup during the punching process, as shown at 8 in Figs; 10 and 11, thusprov d ng a sufficient Width to permit a firm grip on the lock With theWrench. M

It is obvious that immaterial modifications may be made Withoutdeparting from the spirit of my invention. Thus, for example, aplurality of cuts, 4 may bepromember on thelock is undulatedand offset,

vided, or the undulations be increased, be decreased, or be made more orless pronounced, or the offset portions of the shou1-.

ders 7 formed on only one side of the'thread rather than on both, orbeincreased in number, Thebroad idea of invention, however, consistsIessentiallyin providing a lock in which the marginal Wall of the bolthole is formed to coiiperatewith the bolt bv'threaded engagement, and inwhich the thread in opposite directions, so as to cause thesaid-threaded portion to be maintained'in frictional engagement With theopposite faces of the coiiperating and adjacentlbolt threads. In thepreferred construction the severed ends of the single thread arepermanently displaced in opposite directions a distance greater than thethread of the bolt upon which the lock is adapted to be used. Thisresults in an added function; the severed ends being in frictionalengagement with the wall of the bolt thread, and tendtion.

ing "to more firmly engage the lock in posi- Having thus'described myinvention, it

is obvious that various imm'aterial'modificai tions may be made in thesame'within' the scope of the appended claims without aeparting from thespirit of my invention,

hence I do not Wish to be understood as limiting myselfto the exactform, construc-- tion, arrangement and combination of parts herein shownand described, or uses mentioned; a What I claim as new and desire tosecure by Letters Patent is:

1. A nut lock, comprising a disk,having formed therein a bolt hole, theadjacent Wall of which is permanently displaced laterally beyond oneface of the disk to format single substantially resilient undulatingspiral thread thereat, adapted to engage the threaded portion of a bolt.

2. A nut lock, comprising a disk having formed therein a bolt hole, theadjacent Wall being brokenv and permanently ofi'set laterally on bothsides to form a single resilientprogressive thread, thethread beingundulated to cause the oppositefaces thereof to firmlyengage the threadsofa bolt upon which the lock may be placed.

3. A nut lock comprising a disk having formed therein a bolt hole, theWall of which isV-shaped to form a thread memher, and severed andpermanently offset lat- I erally to form a single spiral thread, saidthread memberbeinn undulated and proprogressive resilient threadthereon, said a thread, member being undulated" and provided with animpinging shoulder, tending to impinge upon the adjacent portions of thethread of a boltupon which the; lock is placed toprevent accidentaldisengagement of the parts.

a bolt hole formed therein, the Wall of Which is V-shaped to form asingle resilient thread adapted to engage a bolt thread and permanentlydisplaced on opposite sides of the disk, a distance greater than thepitch of the thread of the bolt upon which it is adapted to be used. a iI In testimony whereof, I have hereunto signed my name in the presenceoftwo subscribing Witnesses.

EDWARD R. HIE-HARD. Witnesses: y a f 7 ROY W. HILL,

CHARLES I. Conn.

I a i 5. A nut lock, comprising a disk having I i

